// Boost.Bimap | |
// | |
// Copyright (c) 2006-2007 Matias Capeletto | |
// | |
// Distributed under the Boost Software License, Version 1.0. | |
// (See accompanying file LICENSE_1_0.txt or copy at | |
// http://www.boost.org/LICENSE_1_0.txt) | |
/// \file relation/support/get_pair_functor.hpp | |
/// \brief get_pair_functor definition | |
#ifndef BOOST_BIMAP_RELATION_SUPPORT_GET_PAIR_FUNCTOR_HPP | |
#define BOOST_BIMAP_RELATION_SUPPORT_GET_PAIR_FUNCTOR_HPP | |
#if defined(_MSC_VER) && (_MSC_VER>=1200) | |
#pragma once | |
#endif | |
#include <boost/config.hpp> | |
#include <boost/bimap/relation/support/pair_by.hpp> | |
namespace boost { | |
namespace bimaps { | |
namespace relation { | |
namespace support { | |
/// \brief A Functor that takes a relation as a parameter an return the desired view. | |
/** | |
This functor is included to help users of the relation class when using | |
stl algorithms. | |
See also member_at, pair_by(). | |
\ingroup relation_group | |
**/ | |
template< class Tag, class Relation > | |
struct get_pair_functor | |
{ | |
BOOST_DEDUCED_TYPENAME result_of::pair_by<Tag,Relation>::type | |
operator()( Relation & r ) const | |
{ | |
return pair_by<Tag>(r); | |
} | |
BOOST_DEDUCED_TYPENAME result_of::pair_by<Tag,const Relation>::type | |
operator()( const Relation & r ) const | |
{ | |
return pair_by<Tag>(r); | |
} | |
}; | |
/// \brief A Functor that takes a relation as a parameter an return the above view. | |
/** | |
\ingroup relation_group | |
**/ | |
template< class Relation > | |
struct get_above_view_functor | |
{ | |
BOOST_DEDUCED_TYPENAME Relation::above_view & | |
operator()( Relation & r ) const | |
{ | |
return r.get_view(); | |
} | |
const BOOST_DEDUCED_TYPENAME Relation::above_view & | |
operator()( const Relation & r ) const | |
{ | |
return r.get_view(); | |
} | |
}; | |
} // namespace support | |
} // namespace relation | |
} // namespace bimaps | |
} // namespace boost | |
#endif // BOOST_BIMAP_RELATION_SUPPORT_GET_PAIR_FUNCTOR_HPP | |